diff options
| author | Vinod Koul <vkoul@kernel.org> | 2018-07-16 07:50:26 +0200 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2018-07-27 13:04:32 +0200 |
| commit | ba3ab6371cdda214bf3d416edae62809a68d0b73 (patch) | |
| tree | 123857687df48554858f7747e8ee3ffca0d3ab0e /drivers/crypto/qcom-rng.c | |
| parent | dt-bindings: crypto: Add new compatible qcom, prng-ee (diff) | |
| download | linux-ba3ab6371cdda214bf3d416edae62809a68d0b73.tar.xz linux-ba3ab6371cdda214bf3d416edae62809a68d0b73.zip | |
crypto: qcom-rng - Add support for prng-ee
Qcom 8996 and later chips features multiple Execution Environments
(EE) and secure world is typically responsible for configuring the
prng.
Add driver data for qcom,prng as 0 and qcom,prng-ee as 1 and use
that to skip initialization routine.
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'drivers/crypto/qcom-rng.c')
| -rw-r--r-- | drivers/crypto/qcom-rng.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/drivers/crypto/qcom-rng.c b/drivers/crypto/qcom-rng.c index e921382099d7..80544326e310 100644 --- a/drivers/crypto/qcom-rng.c +++ b/drivers/crypto/qcom-rng.c @@ -28,6 +28,7 @@ struct qcom_rng { struct mutex lock; void __iomem *base; struct clk *clk; + unsigned int skip_init; }; struct qcom_rng_ctx { @@ -128,7 +129,10 @@ static int qcom_rng_init(struct crypto_tfm *tfm) ctx->rng = qcom_rng_dev; - return qcom_rng_enable(ctx->rng); + if (!ctx->rng->skip_init) + return qcom_rng_enable(ctx->rng); + + return 0; } static struct rng_alg qcom_rng_alg = { @@ -168,6 +172,8 @@ static int qcom_rng_probe(struct platform_device *pdev) if (IS_ERR(rng->clk)) return PTR_ERR(rng->clk); + rng->skip_init = (unsigned long)device_get_match_data(&pdev->dev); + qcom_rng_dev = rng; ret = crypto_register_rng(&qcom_rng_alg); if (ret) { @@ -188,7 +194,8 @@ static int qcom_rng_remove(struct platform_device *pdev) } static const struct of_device_id qcom_rng_of_match[] = { - { .compatible = "qcom,prng" }, + { .compatible = "qcom,prng", .data = (void *)0}, + { .compatible = "qcom,prng-ee", .data = (void *)1}, {} }; MODULE_DEVICE_TABLE(of, qcom_rng_of_match); |